Make blaclisting easier - disable Vim Vixen for specific websites

[joepio]

I'm opening this issue because:

• I'll report a bug
• I'll propose a new feature

Description

I love this plugin, but only after trying it for the second time. The first time, I was too frustrated with the blacklist UX. There are so many websites which I want to blacklist, but I really dislike having to manually edit the JSON every time I encouter a new website where this is the case.

There are few solutions. I'll order them by how easy it is for the end user, in my opinion:

• When clicking on the Vim Vixen logo, disable / enable for the current origin / domain instead of tab. This means, add it to or remove it from the blacklist. This changes the current behavior, but I think it makes sense. This is also how the very popular uOrigin extension works - disabling is domain scoped by default.
• Add a menu that opens when clicking on the VimVixen logo. This could then provide a toggle (described above) and show things like a link to the docs.
• Add a blacklist_toggle command. It does what you think it does. This has very low discoverability, but I think it may be the simplest solution that satisfies the core need!
• shift+escape disables for domain instead of tab. Similar to the first suggestion.

And thanks so much for maintaining this :)